Peter Brnert1, Julia Weller2, Ingmar Graesslin1
1Philips Research Europe, Hamburg, Germany; 2University Hamburg, Hamburg, Germany
In this work an alternative concept for SAR reduction in parallel transmission is proposed. Core element of this approach is the idea that different areas in the sampling k-space show different sensitivities to signal imperfections. Thus, instead of using a single and fixed RF pulse for image acquisition, different RF pulses are used in a k-space dependent manner. Each of these RF pulses might show a different performance resulting in a different SAR value. The average SAR over such a single scan can thus be reduced compared to the use of a fixed RF pulse without scarifying significant image quality.